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gfarm2fs - mount a Gfarm file system


gfarm2fs mount_point [ options ]


gfarm2fs mounts the Gfarm file system at the specified mount point.


-h display a list of command options.

-V display version.

-o opt,[opt...]
specify mount options.


-o syslog=facility
specify syslog facility. default is local0.

-o loglevel=priority
specify syslog priority level. default is notice.

-E T specify the timeout of attribute cache. default is 1.0 seconds.

-o gfs_stat_timeout=T
same as -E option

-o ncopy=N
specify the number of copies automatically created when a file is created. default
is 0, which means disabling automatic replication mechanism.

-o copy_limit=N
specify the maximum number of concurrent copy creations. this is effective if
automatic replication is enabled. default is 0.

-o disable_genuine_nlink
uses faked st_nlink (32000) of struct stat for directories.

-o auto_uid_min=N
specify the minimum UID automatically assigned.

-o auto_uid_max=N
specify the maximum UID automatically assigned.

-o auto_gid_min=N
specify the minimum GID automatically assigned.

-o auto_gid_max=N
specify the maximum GID automatically assigned.


see gfarm2fs -h


specifies the Gfarm configuration file.


When there is not the same local account name as the Gfarm global user name, a temporal
UID is assigned between auto_uid_min and auto_uid_max. When there is not the same local
group name as the Gfarm global group name, a temporal GID is assigned between auto_gid_min
and auto_gid_max.

When a temporal UID/GID cannot be assigned, setfacl(1) fails with EPERM.


When untrusted users are registered in the gfarmroot group or gfarm_root.{user,group}
extended attributes of any files or directories, a Security Hole exists on the mount point
of gfarm2fs with "-o suid,allow_other" option executed by root (even if either "-o ro"
option or "-o default_permissions" option is also specified). Therefore both "-o
suid,allow_other" option and gfarm_root.{user,group} extended attributes should not be

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